System of measuring three-dimensional position

1. A system of measuring a three-dimensional position of a measurement point, the system comprising: a pointing rod positioned on the measurement point; a prism fixed at a position deviated by a known first fixed length from the measurement point in an axial direction of the pointing rod; an inclination casing for fixing an analysis pattern which is located at a position deviated by a known second fixed length from the prism in the axial direction of the pointing rod and is located on a plane perpendicular to the axial direction of the pointing rod; and a survey machine including a section of measuring a distance to the prism, a section of measuring an angle, and an image-taking section, the three-dimensional position of the measurement point being measured from a three-dimensional position of the prism obtained in the sections of measuring the distance and the angle, an inclination direction of the pointing rod obtained from an image obtained by imaging the inclination casing by means of the image-taking section, and the first fixed length.

2. The system of measuring the three-dimensional position of the measurement point as claimed in claim 1 , wherein the system includes: obtaining a three-dimensional position of a prism center of the prism in the sections of measuring the distance and the angle, calculating a pattern center of the analysis pattern by analyzing the image obtained by means of imaging the inclination casing; calculating a positional direction of the inclination casing from the pattern center and the prism center on the image; calculating the three-dimensional position of the pattern center to which a distance from the three-dimensional position of the prism center on the positional direction of the inclination casing is the second fixed length; and measuring the three-dimensional position of the measurement point by moving positional information from the three-dimensional position of the prism center in a direction along a line between three-dimensional position of the pattern center and the three-dimensional position of the prism center by the first fixed length.

3. The pointing rod used in the system of measuring the three-dimensional position of the measurement point as claimed in claim 1 , wherein the prism is fixed to the position deviated by the known first fixed length from the measurement point in the axial direction of the pointing rod, and the inclination casing fixes the analysis pattern which is located at the position deviated by the known second fixed length from the prism in the axial direction of the pointing rod and is located on the plane perpendicular to the axial direction of the pointing rod.

4. A system of measuring a three-dimensional position of a measurement point, the system comprising: a pointing rod positioned on the measurement point; a prism fixed at a position deviated by a known first fixed length from the measurement point in an axial direction of the pointing rod; an inclination casing for fixing an analysis pattern which is located at a position deviated by a known second fixed length from the prism in the axial direction of the pointing rod and is located on a plane perpendicular to the axial direction of the pointing rod; and a survey machine including a section of measuring a distance to the prism, a section of measuring an angle, an image-taking section of shooting a surrounding scene, and a prism image-taking section of shooting the prism, the three-dimensional position of the measurement point being measured from a three-dimensional position of the prism obtained in the sections of measuring the distance and the angle after imaging the prism with the prism image-taking section for collimating the prism, an inclination direction of the pointing rod obtained by an image obtained from imaging the inclination casing by means of the image-taking section, and the first fixed length.

5. A method of measuring a three-dimensional position of a measurement point, the method comprising the steps of, by using a pointing rod positioned on the measurement point, a prism fixed at a position deviated by a known first fixed length from the measurement point in an axial direction of the pointing rod, an inclination casing for fixing an analysis pattern which is located at a position deviated by a known second fixed length from the prism in the axial direction of the pointing rod and is located on a plane perpendicular to the axial direction of the pointing rod, and a survey machine including a section of measuring a distance to the prism, a section of measuring an angle, and an image-taking section: obtaining a three-dimensional position of a prism center of the prism in the sections of measuring the distance and the angle; calculating a pattern center of the analysis pattern by analyzing an image obtained by imaging the inclination casing; calculating a positional direction of the inclination casing from the pattern center and the prism center on the image; calculating a three-dimensional position of the pattern center which is deviated from the three-dimensional position of the prism center by the second fixed length on the positional direction of the inclination casing; and measuring the three-dimensional position of the measurement point by moving positional information from the three-dimensional position of the prism center in a direction along a line between the three-dimensional position of the pattern center and the three-dimensional position of the prism center by the first fixed length.

6. A system of measuring a three-dimensional position of a measurement point, the system comprising: a pointing rod positioned on the measurement point; a target fixed at a position deviated by a known first fixed length from the measurement point in an axial direction of the pointing rod; an inclination casing for fixing an analysis pattern which is located at a position deviated by a known second fixed length from the target in the axial direction of the pointing rod and is located on a plane perpendicular to the axial direction of the pointing rod; and a survey machine including a section of measuring a distance to the target, a section of measuring an angle, and an image-taking section, wherein an inclination casing for fixing an analysis pattern which is located at a position deviated by a known second fixed length from the target in the axial direction of the pointing rod and is located on a plane perpendicular to the axial direction of the pointing rod, a three-dimensional position of the target center is obtained in the sections of measuring the distance and the angle; a positional direction of the inclination casing is calculated from the pattern center and the target center on the image, a three-dimensional position of the pattern center is calculated which is deviated from the three-dimensional position of the target center by the second fixed length in the positional direction of the inclination casing, and the three-dimensional position of the measurement point is measured by moving positional information from the three-dimensional position of the target center in a direction along a line between the three-dimensional position of the pattern center and the three-dimensional position of the target center by the first fixed length.

7. A system of measuring a three-dimensional position of a measurement point, the system comprising: a prism fixed at a position deviated by a known first fixed length from the measurement point; an inclination casing for fixing an analysis pattern which is located at a position deviated by a known second fixed length from the prism in a same direction of the first fixed length and is located on a plane perpendicular to a line between the measurement point and a prism center of the prism; and a survey machine including a section of measuring a distance to the prism, a section of measuring an angle, and an image-taking section, wherein a three-dimensional position of the prism center is obtained in the distance measuring section and the angle measuring section, a pattern center of the analysis pattern is calculated by analyzing an image obtained by imaging the inclination casing, a positional direction of the inclination casing is calculated from the pattern center and the prism center on the image, a three-dimensional position of the pattern center is calculated which is deviated from the three-dimensional position of the prism center by the second fixed length in the positional direction of the inclination casing, and the three-dimensional position of the measurement point is measured by moving positional information from the three-dimensional position of the prism center in a direction along a line between the three-dimensional position of the pattern center and the three-dimensional position of the prism center by the first fixed length.